EP3550824B1 - Methods and apparatus for remotely controlling a camera in an environment with communication latency - Google Patents

Methods and apparatus for remotely controlling a camera in an environment with communication latency Download PDF

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Publication number
EP3550824B1
EP3550824B1 EP19167401.9A EP19167401A EP3550824B1 EP 3550824 B1 EP3550824 B1 EP 3550824B1 EP 19167401 A EP19167401 A EP 19167401A EP 3550824 B1 EP3550824 B1 EP 3550824B1
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EP
European Patent Office
Prior art keywords
camera
image
command
control device
accordance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19167401.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3550824A1 (en
EP3550824C0 (en
Inventor
Paul Shen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TVU Networks Corp
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TVU Networks Corp
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Publication date
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Publication of EP3550824A1 publication Critical patent/EP3550824A1/en
Application granted granted Critical
Publication of EP3550824C0 publication Critical patent/EP3550824C0/en
Publication of EP3550824B1 publication Critical patent/EP3550824B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
    • H04N23/661—Transmitting camera control signals through networks, e.g. control via the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00249—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector
    • H04N1/00251—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector with an apparatus for taking photographic images, e.g. a camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/62—Control of parameters via user interfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems

Definitions

  • the present invention relates to the field of digital video recording. More specifically, the present invention relates to the remote control of a camera (or other video recording device) in an environment where communication latency is present between the camera and a monitor at the control site.
  • a camera may be controlled from a remotely located control device (e.g., an Internet enabled device running a web browser or control application) which has a monitor for viewing the camera image.
  • a remotely located control device e.g., an Internet enabled device running a web browser or control application
  • the user may be enabled to remotely view the camera image on the monitor and control the camera from the control device, such that the corresponding changes to the image provided by the camera can be viewed on the monitor.
  • the user can see a quick response (image change) on the monitor at the remotely located control site.
  • US 2002/057348 A1 discloses a video display control method comprising the steps of generating camera operation information concerning an operation of a camera operated by a remote control, transmitting data of video captured by the camera and the camera operation information to a control apparatus via a network, and processing the data of the video based on the camera operation information so that an image of the video can be displayed at the control apparatus.
  • US 2013/155182 A1 discloses a method performed in a system that includes a remote viewer terminal and an image capture device that is controllable to change a field of vision, with respect to a fixed coordinate system, of images produced by the image capture device, the method comprising producing, by the image capture device, a plurality of images associated with a plurality of fields of vision, transmitting, over a data path, the plurality of images produced by the image capture device, receiving, over the data path, a regress command that includes a reference to a selected field of vision of the plurality of fields of vision, and in response to receiving the regress command, producing, by the image capture device, additional images associated with the selected field of vision.
  • US 2015/022674 A1 discloses a wireless video camera that permits bookmarking of objects in the surrounding environment of the camera.
  • US 2015/378000 A1 discloses a method and a system configured for compensating a delay in communication between a sending unit and a control unit.
  • the present invention relates to the remote control of a camera or other video recording device in an environment where communication latency is present between the camera and a monitor at the control site.
  • a control device for controlling a remotely located camera via a network.
  • the control device comprises a monitor for viewing an image provided by the camera.
  • a control signal is sent from the control device to the camera with a command for controlling at least one of a function, setting, or parameter of the camera.
  • An image displayed on the monitor of the control device is modified in accordance with the command to provide an emulated image for display prior to execution of the command at the camera.
  • the emulated image is seamlessly replaced with the actual image from the camera once the command is executed and the actual image is received at the control device.
  • a time code is provided for the command in the control signal.
  • the time code is embedded in an image frame upon execution of the command by the camera. Then, the emulated image is replaced with the actual image upon receipt of the image frame with the time code at the control device.
  • Each of the image and the emulated image may comprise one of a still image or a video image.
  • the at least one of a function, setting, or parameter of the camera may comprise at least one of pan, tilt, zoom, brightness, contrast, white balance, and the like.
  • the camera may comprise one of a PTZ camera, a security camera, a smart phone camera, an IP camera, or the like.
  • the control device may comprise one of a dedicated hardware device, a software application running on one of a computer, a laptop computer, a tablet computer, a smart phone and an Internet enabled device, a web page running on a web browser, or the like.
  • control signals may be provided from the control device to the camera based on the emulated image.
  • a sensor size of the camera may be higher than a video resolution of the image.
  • the command may be specific to a camera type of the camera.
  • the command may be converted into a camera-specific command based on an emulation model assigned to the camera.
  • the camera specific command may be applied to a live video signal received from the camera at the monitor in accordance with the emulation model.
  • the camera-specific command may be sent from the control device to the camera once a user has completed adjusting the function, setting, or parameter of the camera.
  • An embodiment of a system according to claim 2 comprises a network, a remotely located camera, and a control device for controlling the remotely located camera via the network.
  • the control device comprises a monitor for viewing an image provided by the camera.
  • the control device is adapted to send a control signal to the camera with a command for controlling at least one of a function, setting, or parameter of the camera.
  • the control device modifies an image displayed on the monitor in accordance with the command to provide an emulated image for display prior to execution of the command at the camera.
  • the systems and apparatus of the present disclosure may also include various features of the method embodiments discussed above.
  • a method for remotely controlling a camera in an environment where there is a delay comprising:
  • each of the image and the emulated image comprises one of a still image or a video image.
  • the method wherein the at least one of a function, setting, or parameter of the camera comprises at least one of pan, tilt, zoom, brightness, contrast, and white balance.
  • the camera comprises one of a PTZ camera, a security camera, a smart phone camera, or an IP camera.
  • control device comprises one of a dedicated hardware device, a software application running on one of a computer, a laptop computer, a tablet computer, a smart phone and an Internet enabled device, or a web page running on a web browser.
  • a sensor size of the camera is higher than a video resolution of the image.
  • the method wherein: the command is converted into a camera-specific command based on an emulation model assigned to the camera.
  • the method wherein the camera specific command is applied to a live video signal received from the camera at the monitor in accordance with the emulation model.
  • the method wherein the camera-specific command is sent from the control device to the camera once a user has completed adjusting the function, setting, or parameter of the camera.
  • a system for remotely controlling a camera in an environment where there is a delay comprising:
  • each of the image and the emulated image comprises one of a still image or a video image.
  • the system wherein the at least one of a function, setting, or parameter of the camera comprises at least one of pan, tilt, zoom, brightness, contrast, and white balance.
  • the system wherein the camera comprises one of a PTZ camera, a security camera, a smart phone camera, or an IP camera.
  • control device comprises one of a dedicated hardware device, a software application running on one of a computer, a laptop computer, a tablet computer, a smart phone and an Internet enabled device, or a web page running on a web browser.
  • control signals are provided from the control device to the camera based on the emulated image.
  • a sensor size of the camera is higher than a video resolution of the image.
  • the system wherein the command is specific to a camera type of the camera.
  • the system wherein: the command is converted into a camera-specific command based on an emulation model assigned to the camera.
  • the system wherein the camera specific command is applied to a live video signal received from the camera at the monitor in accordance with the emulation model.
  • the system wherein the camera-specific command is sent from the control device to the camera once a user has completed adjusting the function, setting, or parameter of the camera.
  • the present invention relates to the remote control of video recording in an environment where communication latency is present between the camera and a monitor at the control site.
  • An example embodiment of the present invention is illustrated in Figure 1 .
  • a camera 10 is provided that is controlled remotely from a control device 12.
  • the camera 10 may comprise a high end PTZ (Pan, Tilt, Zoom) camera, a low-cost security camera, a smartphone camera, an IP camera, or the like.
  • PTZ Pan, Tilt, Zoom
  • the control device 12 is a device which is remote from the camera 10 and adapted to control various aspects of the camera's functions, settings, and parameters such as pan, tilt, zoom, brightness, contrast, white balance, and other functions, settings, and parameters.
  • the control device 12 may comprise a user interface for inputting commands for controlling the camera 10.
  • the control device 12 may comprise a high end dedicated control device (i.e., a specific hardware component designed for remotely controlling a specific camera), a software application running on a computer device (e.g., a desktop computer, a laptop computer, a tablet computer, a smartphone, or other Internet enabled device), or a web page which the user accesses via a web browser on an Internet enabled device.
  • a monitor 14 is provided on the control device 12 (or otherwise associated therewith or connected thereto) for viewing an image provided by the camera 10 (e.g., via image signal 20).
  • the control device 12 may be adapted to communicate with the camera 10 via a wired or wireless network 16.
  • the network 16 may comprise one or more of a wide area network, a local area network, a radio frequency network, a cellular network, the Internet, Bluetooth, or the like.
  • the user is enabled to view the camera image on a monitor 14 of the control device 12.
  • the control device 12 enables the user to remotely control the camera 10 by sending a control signal 18 to the camera 10 over the network 16.
  • the control signal comprises a command for controlling at least one of a function, setting, or parameter of the camera 10. The changes brought about on the camera 12 by the control signal 18 can then be observed on the monitor 14 of the control device 12.
  • the command that is sent in the control signal 18 is also provided to the monitor 14 of the control device 12.
  • the control device 12 will modify the image being displayed on the monitor 14 in accordance with the command, emulating how the camera 10 will behave.
  • the monitor 14 will use the command to emulate the image to be provided by the camera 10 in response to the control signal 18, before the actual control signal 18 reaches the camera 10 and the resultant image signal 20 is returned to the control device 12. This way the user can precisely control all the functions, settings, and parameters of the camera 10 without delay.
  • the monitor 14 of the control device 12 will seamlessly switch from the emulated image to the actual image being received from the camera 10.
  • the emulated image is generated by the monitor 14 and/or the control device 12 by applying the same command contained in the control signal, carrying out the command effects on the current image from the camera 10 which has not yet been affected by the control signal 18.
  • the command sent in the control signal 18 may require the camera 10 to increase its brightness setting. Due to latency in the communication network between the camera 10 and the control device 12, the image being displayed on the monitor 14 of the control device 12 would not immediately display with an increased brightness.
  • the same command is also used to modify the current image being displayed on the monitor 14 so that it emulates the image at the camera 10, the user can immediately see the effects of the control signal 18 on the image, and proceed to make further desired changes to the camera functions, settings, or parameters by providing further control signals/commands to the camera based on the emulated image shown on the monitor 14.
  • the camera 10 may produce either video or still images to be displayed by the monitor 14, and that the term "image" as used herein encompasses both still images and video.
  • the present invention leverages the difference between the camera sensor size and normal video resolution in order to provide features such as pan and zoom and corresponding emulated images.
  • camera sensor size is much higher than normal video resolution.
  • an iPhone camera sensor is 12MP (4240x2832 pixels), and normal HD video only needs 1920x1080 pixel resolution.
  • the camera 10 may capture a 12MP image 19, but only a portion (1920x1080) of the image 20 is streamed to and displayed on the monitor 14.
  • the image displayed on the monitor 14 will at first be an emulated image 20' in which the previous image is offset to the left, with a right-hand portion of the screen in black, as shown in Figure 3 .
  • the right-hand side of the emulated image 20' is in black since the monitor 14 has not received any data for this portion of the image (even though this was available at the camera 10 as shown in Figure 2 ).
  • the modified image is then streamed to the monitor 14 and replaces the emulated image 20' (thus providing the missing data for the right-hand side of the image), as shown in Figure 4 .
  • the system enables pan and zoom to be carried out over the entire sensor range of the camera 10.
  • the original (full) image size originally captured by the camera sensor as shown in Figure 2 , is used as the boundary for the pan and zoom commands.
  • a signal or other indicator can be embedded in the video stream 20 provided by the camera 10 after execution of the command.
  • the system will turn off the emulation and display the actual image when the indicator arrives at the monitor 14.
  • a time code for the video can be sent in the control signal 18 with the command to be executed on the camera 10.
  • the time code is then embedded in an image frame upon execution of the command by the camera 10.
  • the emulation can then be turned off when an image frame with that time code arrives at the monitor 14.
  • the command may be specific to a camera type of the camera 10.
  • the command input by the user via a user interface of the control device 12 may be converted into a camera-specific command based on an emulation model assigned to the camera 10.
  • the camera specific command may be applied to a live video signal received from the camera 10 at the monitor 14 in accordance with the emulation model.
  • the camera-specific command may be sent from the control device 12 to the camera 10 only once a user has completed adjusting the function, setting, or parameter of the camera 10.
  • the present invention provides advantageous methods and apparatus for remotely controlling a camera in an environment having a communication latency.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Studio Devices (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Selective Calling Equipment (AREA)
EP19167401.9A 2018-04-06 2019-04-04 Methods and apparatus for remotely controlling a camera in an environment with communication latency Active EP3550824B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862653613P 2018-04-06 2018-04-06
US16/369,062 US11212431B2 (en) 2018-04-06 2019-03-29 Methods and apparatus for remotely controlling a camera in an environment with communication latency

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EP3550824A1 EP3550824A1 (en) 2019-10-09
EP3550824C0 EP3550824C0 (en) 2023-07-26
EP3550824B1 true EP3550824B1 (en) 2023-07-26

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US (1) US11212431B2 (zh)
EP (1) EP3550824B1 (zh)
JP (1) JP2019186934A (zh)
KR (1) KR20190117379A (zh)
CN (1) CN110351477B (zh)
CA (1) CA3038729A1 (zh)
ES (1) ES2952188T3 (zh)

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CN111131880B (zh) * 2019-12-30 2022-04-12 中国银行股份有限公司 网页定制化录像方法及装置

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US20190313006A1 (en) 2019-10-10
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ES2952188T3 (es) 2023-10-30
CN110351477A (zh) 2019-10-18
KR20190117379A (ko) 2019-10-16
CA3038729A1 (en) 2019-10-06
US11212431B2 (en) 2021-12-28
CN110351477B (zh) 2022-11-01

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